<?php
class Zendvn_File_Upload extends Zend_File_Transfer_Adapter_Http
{
	public function upload($file_name, $upload_dir, $options = null, $prefix = 'file_')
	{		
		if($options == null)
		{
			$this->setDestination($upload_dir, $file_name);
			$info = $this->getFileInfo($file_name);
			$newFileName = $info[$file_name]['name'];
			$this->receive($file_name);
		}
		
		if($options['task'] == 'rename' )
		{
			$info = $this->getFileName($file_name);
			preg_match('#\.([^\.]+)$#',$info,$matches);
			$fileExtension  = $matches[1];
			$newFileName 	= $prefix . time() . '.' . $fileExtension;
			$options = array('target' => $upload_dir . '/' . $newFileName, 'overwrite'=>true);
			$this->addFilter('Rename', $options, $file_name);
			$this->receive($file_name);
		}
		return $newFileName;
	}
	
	public function removeFile($filename)
	{
		@unlink($filename);
	}
}